Regina Calculation Engine
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An output stream buffer that compresses data as it is written. More...
#include <utilities/zstream.h>
Public Member Functions | |
CompressionBuffer () | |
Creates a new compression stream buffer. | |
CompressionBuffer (const char *path) | |
Creates a new compression stream buffer that writes to the given file. | |
int | open (const char *path) |
Opens the given file for compressed writing. | |
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virtual | ~ZBuffer () |
Destroys this stream buffer. | |
virtual int | overflow (int c) |
Writes the given character to the underlying file, compressing en route. | |
virtual int | underflow () |
Reads the next character from the underlying file, decompressing en route. | |
virtual int | uflow () |
Reads the next character from the underlying file, decompressing en route. | |
virtual std::streamsize | xsputn (const char *s, std::streamsize n) |
Writes the given set of characters to the underlying file, compressing en route. | |
virtual std::streamsize | xsgetn (char *s, std::streamsize n) |
Reads a set of characters from the underlying file, decompressing en route. | |
virtual int | pbackfail (int c) |
Pushes the given character back into the underlying input stream. | |
virtual int | sync () |
Flushes all input/output buffers. | |
int | close () |
Closes the underlying file. | |
void | showError (std::ostream &out) |
Writes a description of the last (de)compression error that occurred. |
Additional Inherited Members | |
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static const int | zEOF |
The end-of-file marker used with this stream buffer. | |
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ZBuffer () | |
Creates a new stream buffer. | |
int | open (const char *path, const char *mode) |
Opens the given file for (de)compressed reading or writing. |
An output stream buffer that compresses data as it is written.
The standard zlib compression library is used.
This buffer is designed for use with standard C++ I/O streams.
This stream buffer should not be used for input.
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inline |
Creates a new compression stream buffer.
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inline |
Creates a new compression stream buffer that writes to the given file.
The underlying file will be opened automatically.
path | the pathname of the new file to open. |
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inline |
Opens the given file for compressed writing.
If a file is already open, it will be closed before the new file is opened.
path | the pathname of the new file to open. |